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Skip PXE prompt/menu/discover if PXE_DISCOVERY_CONTROL tag bit 3 set.

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Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Ye Ting  <ting.ye@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14332 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
sfu5
2013-05-09 05:28:27 +00:00
parent 4db921cee0
commit 30a95d4d39
4 changed files with 26 additions and 5 deletions
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11
NetworkPkg/UefiPxeBcDxe/PxeBcBoot.c
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@@ -98,6 +98,17 @@ PxeBcSelectBootPrompt (
ASSERT (!Mode->UsingIpv6);
VendorOpt = &Cache->Dhcp4.VendorOpt;
//
// According to the PXE specification 2.1, Table 2-1 PXE DHCP Options,
// we must not consider a boot prompt or boot menu if all of the following hold:
// - the PXE_DISCOVERY_CONTROL tag(6) is present inside the Vendor Options(43), and has bit 3 set
// - a boot file name has been presented in the initial DHCP or ProxyDHCP offer packet.
//
if (IS_DISABLE_PROMPT_MENU (VendorOpt->DiscoverCtrl) &&
Cache->Dhcp4.OptList[PXEBC_DHCP4_TAG_INDEX_BOOTFILE] != NULL) {
return EFI_ABORTED;
}
if (!IS_VALID_BOOT_PROMPT (VendorOpt->BitMap)) {
return EFI_TIMEOUT;
}